Sewing-machine.



L. E. JOHNSON & E. ERIOKSON.

SEWING MACHINE.

APPLICATION FILED MAY 19, 1913.

Patented Mar. 23, 1915.

6 SHBETSSHEET 1.

L. E. JOHNSON & E. ERICKSON. v

SEWING MACHINE. APPLICATlUN FILED MAY 19. 1913.

Patented Mar. 23, 1915.

s SHEETS-SHEET 2.

L. E. JOHNSON & E. ERIOKSON. SEWING MACHINE.

v APPLICATION FILED MAY 19, 1913. L1 go Patented Mar. 28, 1915.

6 SHEETSSHEET 3.

L. B. JOHNSONK: E. ERIGKSON. SEWING MACHINE. APPLICATION FILED MAY 19,1913.

9 1 1 Wu v r PatentedMar. Q3, 1915.

6 SHEETS-SHEET 4.

L. E. JOHNSON & E. ERIOKSON.

SEWING MACHINE.

APPLIOATION FILED MAY 19, 1913.

Patented Mar. 23, 1915.

6 SHEETS-SHEET 5.

ll m clnwwm,

. L. E. JOHNSON & E. EPLHTKS'ON.

SEWING MACHINE.

APPLICATION FILED MAY 19, 1913.

1 a, Patented M21323, 1915,

6 SHEETS-SHEET 6.

cam for operating the looper.

.assrenons no vro'ron snon raaonrnnnr so on season A tl llliln snnrnontnenntn .Khn 'v i Lilohi il ll Specification oztftottera.

Patented 29th,

implication filed may 1.9, 1913. Serial No. 76$,t5l71.

To 0:55 whom it may concern:

Be it lrnovvn that We, Lawrnnon lid. donnson a citizen ot the UnitedStates of America and a, resident ot" Winthrop, in the county ofSuflollr and State ol Massachusetts, and Fimvano Fruonso), asubjectot hKing, Swedernandresident of Lynn, in the county of Essex and State orMassa hneetts,.haveinvented certain new and usef l. thaw/enema inSewing-Machines. of which tbetollotving is a specification.

This invention relates to improvements in shoe-sewing machines, and moreespecially to loehstitch Wan thread machines tor stitching outer solesof shoes to the Welt, and it consists in certain novel teaturesofconstrnetion and arrangement of parts which vvillbe readily understoodby reference to thedescription-ol the drawings and'to the claimshereinafter given @t' the drawings? Figure 1 represents a plan of aserving machine embodying the invention. Fig. 2 represents a frontelevation of the some. Fig. 3 represents an elevation of the left end ofthe same. Fig. l represents an elevation of the right end of the same.Fig. 5 represents a vertical section of the same, loohing to the right,the cutting plane being on line 55 on Fig. 1. Fig. 6 represents avertical section of the same, looking to the left, the cutting planebeing on line 6 6 on Fig. 1. Fig. 7 represents an elevation of theneedle and awl driving members and showing the looper hook and the camfor operatingit. Fig. 8 represents a plan of the rear end of the loopersupport and showing in section a portion of the Fig. 9 represents asectional detail of the shuttle cap locking; mechanism, the cuttingplane being on line 9-9 on Fig. 3. Fig. 10 represents a transversesection of the same. the cutting plane being on line 10-l0 on Fig. 9.Figs. 11 and 12 represent details of the looper to be hereinafterdescribed.

Similar characters designate litre parts ihroughont'the several figuresof the draw "HTS.

in the drawings, is the base ot themachine adapted to be secured to acolumn and having the end linmea 2d and pro vided with hearings tor therevoluble shaft 9 3. The revohrbleshaft-'23 has thedriving wheel.btsecnred to one end thereof want to its opposite end isrheyeds-the-cam25. interposed between the side frames Ql, and 22and lreyeoltothe shaft23 are the cam. dislrs Qdand d7. To the-inner side of the .sideifrarno21 is sect-med the Work support 28. which -may' be of any Well-knownconstruction, the securing means consisting of. the bolts 29-29. Theside "frame 21 has also formed upon its inner face a race 3G for theshuttle. 31 which is driven by a plate 311 having a shuttle engaging lug312 and provided with a shank 32 having; keyed to its outer end a gear33- partially surrounded by the flange 34: termed on the outer face ofthe side frame 2t. Meshing? With the gear 33 1s a gear segment 35 termedupon the end of a lever 36 pivoted at 37 to the side frame 21, theopposite end or arm of said lever being articulated at 38 to aconnectingrod 39 pivotally connected to the cam dish by the, stud 40.FVhen the cam dish) 25' is rotated in the direction otthe arrorv a: onFig. 3 an oscillating movement will be imparted to the segment by theconnecting rod 39. lit will be observed that the total length of theoperating arm of the lever 86 and the connecting rod 39 between thecenters of the stud t0 and pivot 37 is greater than the direct distancebetween saidpoints so that it is impossible torthese members to comeinto alinement under-any condition. Thi oscillation ofthe segment 3L5irvill part the required inovementto the. plateau and through the lug312' ,to 'thnfshuttlefit. The shuttle 3lis provided with axcap d1pivoted at d2 tojtheside frame EZL said cap beingadapted to-be movedabout its pivot to permit the removal ot the shuttle 31 when it isdesired to renewtha bobbin. Normally the cap it is'retai'ned in theposition shown in thedrarvings by. the locking member. at extendingtherofrorninto-a slot in the extension 44 ot' the side frame 21. In abearing in the extension ist is a member 45 having a depression in itsinner end into which extends the outer end of the member 48 which. isprovided with a pin 46 normally engaging a notch d? in the member 45to-lixuitthe oscillation of the member 45 about its axis A portion ofthe wall of said depression 18 titl cut away to permit the removal ofthe locking member 43. The outer end of the member 45 has securedthereto by a nut 431 a handle 48 by which said member 45 may be movedsufficiently about its axis to cause the cut-away portion thereof toregister with the slot in the arm 44 and thus permit the locking member43 to be removed from the depression in the end of the member 45 and thecap '41 to be moved upwardly about its pivot 42 so that the shuttle 3lmay be removed.

The cap 41 is provided with a chamber 56 adapted to receive a heater theheat from which will keep the wax thread T within the shuttle 31 incondition for use.

The frame 22 is provided with two parallel studs or pins 60, 61, onwhich is mounted a movable frame 62. This frame has pivoted to the lowerend thereof at 63 an oscillating vslotted lever 64 the lower end ofwhich is provided with a roller 65 extending into a cam path 66 in theperiphery of the cam disk .27 In the slot 67 ofthe lever 64 is a fulcrumblock 68 pivotally mounted in a forked member 69 having a shank 70extending through a straight slot 71 in the frame 22 and also through aslot 72 in a hand lever 73 pivoted at 74 to the end frame 22. Thatportion of the shank that travels in the slot 71 is flattened to fitsaidslot and be guided thereby. The shank 70 is surrounded by washers 75between which is a spring 55 tending to retain the lever 73 against theflange around the slot 71, the friction thereon being suflicient to lockthe lever 73 in adjusted position. The washers 7 5 and spring 55 areretained in position by means of the nut 76. It is obvious that when thecam disk 27 rotates, the cam path 66 thereof will operate upon theroller 65 to actuate the lever 64 about its fulcrum thereby moving theframe 62 a given distance, this distance depending upon the position ofthe fulcrum pin 77. The inclination of the slot 71 conforms to that ofthe 'lever 64 to permit the free movement of the forked member 69lengthwise of the lever 64 without binding thereon.

By means of the handle 73 the position of the fulcrum block 68 may bechanged at will to secure any desired degree of feed. It is obvious thatthe shank 70 will be moved in the slot 71 during the movement of thehand lever 73 about its pivot 74, and when adjusted the friction on thelever will be Suf ficient to retain it in thisposition. When desired thenut 76 may be adjusted so that the lever 7 3 will be ositively locked sothat a continuously uni orm feed of the work will be obtained. The frame62 has a long bearing formed therein in which is mounted the shaft 80having pinned to its outer end a, collar 81 provided with an ear betweenwhich and a pin on the upper end of the frame 62 is interposed a spring82 adapted normally to retain the needle guide 83 se cured to theopposite end of the shaft 80 in proper relative position to the needle84 carried by the needle support 85. The guide 83 is normally positionedby the pin 833 in the hub thereof bearing against a wall of said needlesupport 85, said pin being retained in this contacting position by thespring 82. The needle guide 83 is provided with a slot 83* at its outerend which retains the oil therein and serves as a means for lubricatingthe needle as it moves through said guide in either direction. When theneedle 84 is operating the guide 83 is caused to move with the needlesupport 8.3 by the tension of said spring 82 until the ear on the collar81 comes into contact with the pin 811, when further movement of theguide 83 will be prevented.

The needle support 85 has a gear segment 86 formed thereon and isprovided with a tubular sleeve 86 surrounding the shaft 80 in the longbearing in the frame 62 and about the axis of which it is adapted to beoscillated by the lever 87 having formed thereon at one end a gearsegment 88 meshing with the gear segment 86. a The teeth of the gearsegment 88 are of sullicient length to permit the teeth of the gearsegment 86 to remain constantly in mesh during the movement of the frame62 in either direction. The lever 87 is pivoted at 89 to the frame :21and is provided at its rear end with a roller 90 in the cam path 91formed in the cam disk 26. During the rotation of the disk 26 the campath 91 operates upon thev roller 90 to give the required movement tothe needle segment at the proper time. The needle support 85 has alsosecured thereto the awl 911 positioned thereon so as to enter a slot inthe work support 28 and the work supported thereby during a portion ofthe oscillation of said needle support, this awl being in the samevertical plane with the needle 84.v

The lever 87 is provided on one side with a cam extension 92 adapted toact upon a roller 93 on a bell crank lever 94 pivoted at 95 to the sideframe 21 beneath the shuttle race 30. The forward end of the lever 94has secured therein a looper hook 96 and a spring 97 is provided toretain the roller 93 in contact with the cam extension 92 at all times.The lever 87 is provided with an upwardly extending arm 98 to the upperend of which is pivoted a link 99 the opposite end of which isarticulated to a loop spreader the upper end of the movable frame 62.The forward end of the spreader 100 is curved dmvnwardlv and rearwardlvas indicated in Fig. 6 and its left hand edge is inclined as v100pivoted at101 to the hub 102 formed on shown in Fig. 2. This mechanismprovides a simple means for spreading the loop of thread at the propertime for the book of the shuttle 31 to enter the same.

The thread is drawn from any suitable source of supply and passes over afixed rod 103 extending from one side frame 21 to the other 22, a pin101 extending outwardly from this rod 103 positioning the thread Ifthereon and preventing it from slipping lengthwise thereof. The threadIt then passes around a pin 105 secured to the thread lock cam lever 106which is pivoted at 107 and has at its rear end a roller 108 in the campath 109 formed in the right hand side of the disk 27. The thread tpasses from the pin 105 over a stationary pin 110 in the side frame 22and then through slots in two downwardly extending arms 111 of a forkedmember 112. The thread it passes from one arm 111 to the other arm 111under a stud or pin 113 projecting horizontally from the side of theforward end of the lever 108. From the forked member 112 the thread tpasses through a hole 114 in the movable frame 62 to an eye 115- on theside frame 22 and thence into the wax pot 116 secured to the side frames21 and 22 by the screws 117. To the front wall of the wax pot 116 isclamped, by means of the clamp screw 118, a support 119 having two arms120 extending into the wax pot 116, each arm 120 being provided with asheave 121 around which thethread t passes through the liquid wax insaid pot 116. Having passed through the wax pot the thread t extendsthrough an eye 122 secured to the end frame 21 and then over a sheave123,

revoluble about a stud on the end frame 21. and around a sheave 12 1revoluble about a stud secured to the end of a takeup lever 125 pivotedto the frame 21 at 126 and having articulated thereto at 127 a link 128,the opposite end of which is pivotally connected to a cam lever 129pivoted at 130 to the frame 21. The free end of the lever 129 isprovided with a roller 131 in a cam path 132 formed in the side of thedisk 25, said path being provided with the necessary throws to actuatethe takeup lever 125 at the proper time to take up the slack in thethread. The thread 6 passes from the sheave 124: on the takeup lever 125to the eye 51 in the looper member 127 secured to the forked member128", the downwardly extending arms 129 of which straddle and arepivoted to the squared end 130 of an oscillating member 131*. Thismember 131* has a bearing in the end frame 21 and to its outer end issecured an arm 13 between the outer end of which and an eve 133 in thebase 20 is interposed a spring 134. The rearwardly extending arm 135 isprovided with a roller- 136 positioned in the cam path 137 in theperiphery of the dish 26 and other rollers 1518 held in contact with theperiphery of the disk-26 by the spring 133. The periphery of the disk 26is provided with a throw 139 adapted in the rotation of said disk tooseillate said member 130"131 about its axis while the throw 110 inthecam path 137 is rocking the member 135 about the axis of the pivot pin111, the combined action of these throws forming the necessary looparound the hook of the needle 81 after it has passed through the workand is extending through the slot of the work support 28. The extremeupper end 126* of the looper 127 is provided with an eye 51 and a finger52 extending beyond the end of said eye 51. The eye 51 and finger 52form a slot in which the needle 81 is temporarily positioned during theformation of the loop.

The loop spreader 100 operates in the same plane with the. hook of theshuttle 31 and when the barb of the needle St has drawn the loop ofthread through the work the tapered end of saidspreader will enterbetween the two portions of the'thread on said barb and spread themapart so that the shuttle-hook will be sure to enter. When the needle84- has passed through the work so that its barbed end extends below thework support 28 the looper hook 96 will also be moved downwardly so thatwhen the looper 126 operates the thread (3 will not only be placed uponthe barb .of the needle 84: but it will also be carried around the hook96 so that a given amount of thread will be always measured 0d to becarried through the work by the needle 84 preparatory to its coactingwith the shuttle in the formation of the stitch. Uwing to the pivotalconnection of the looper support 128 whereby it may be tilted in eitherdirection by the cams 139 and 140, the looper 126 will have imparted toit an orbital movement in a path eneirling'that in which the needle 8tmoves and also about the looper book 96, the cams 139-140 being soconstructed and timed that this movement will occur when the needle haspassed through the work and lies within the orbit of the looper.

As has been stated, the needle 81v and the awl 911 are in the samevertical plane and oscillate about' the same axis so that the enteringof the needle 8-1 into the hole in the work formed by the awl is alwaysassured and no opportunity is afforded for them to get out of register.

,The needle and awl support 85 is mounted on a movable frame 62 and whenthe awl is in the work the latter may be fed relative to the worksupport, the len th of feed being determined by thehan le 73, it beingobvious that by means of the devices con trolled by said handle a changein the feed may be obtained at time while the ma-.

chine is running.

It will beseen that by the construction shown and described, a verycompact sewing machine is provided in. which the parts are reduced to aminimum. The machine is particularly adapted to be used by unskilledlabor such as shoe repairers, although it may be used equally as well onnew work.

It is believed that the operation and many advantages of this sewingmachine will be fully understood from the foregoing description.

Having thus described our invention, we claim: 1. In a shoe-sewingmachine, a stitchforming mechanism consisting of a needle, anoscillating shuttle, driving mechanism for said shuttle, a loop-formingmechanism, 'neei'lle-operating mechanism, including a cam-controlledlever, a tapered spreader mounted to operate in a plmeparallel to theneedle, and connections between said cam-controlled lever and spreaderadapted to cause the latter, by the operation of the former, to beoscillated to expand the loop 4 held by the barb ofthe needle as theshuttle cooperates: therewith.

2.- In a shoe-sewing machine, the combination of a needle; operatingmechanism therefor including a camcontrolled lever; a loop-spreadercomprising a tapered finger mounted to operate in a plane parallel tothe needle and having its operating end curved rearwardly; a supporttherefor; and means operable by the cam-controlledlever for moving thespreader transversely of the loop held by the barb of the needle.

3. In a shoe-sewing machine, the combination of a needle; operatingmechanism therefor including a cam-controlled lever; a shuttle, apivoted loop spreader comprising a finger mounted to operate in a planewith the hook of the shuttle and parallel to the needle, said lingerhaving a tapered end curved rearwardly; and means connected with saidcam-controlled lever for-moving said spreader about its pivot andcausing it to expand the loop held by the barb of the needle as theshuttle cooperates therewith.

4. In a shoe-sewing machine, a stitchi'orming mechanism consisting of anoscil- I to cause its wedge-shaped operating end to enter the loop heldby the barb of the needle and spread said loop as the shuttle cooperatestherewith.

6. In a shoe-sewing machine, a stitch forming mechanism consisting of aneedle,

a shuttle mechanism, a loop forming mechanism, and a looper hook adaptedto be retamed in a stationary position within the .orbit of the looperduring the formation of the loop.

7. In a shoe-sewing machine, a stitch forming mechanism consisting of aneedle, a shuttle mechanism, a loop forming mechanism, a looper hookadapted to be retained in a stationary position within the orbit of thelooper during the formation of the loop;

and means for withdrawing said hook prior to the movement of the needleto draw the loop through the work.

8. In a shoe-sewing machine, a stitch forming mechanism consisting of aneedle, operating mechanism therefor, a shuttle mechanism, a loopforming mechanism, and a looper hook operable by said needle operatingmechanism and adapted to be retained in a stationary position within theorbit of the looper during the formation of the loop.

9. In a shoe-sewing machine, the combination of a needle; a supporttherefor provided with a gear segment; a cam controlled lever having agear segment meshing with said needle support gear segment; a pivotedlooper hook; means on said lever for moving said hook about its pivot;and a looper adapted to form a loop about said needle and hook. I

10. In a shoe-sewing machine, a stitch forming mechanism consisting of aneedle, a shuttle mechanism, and a loop forming mechanism combined witha pivoted looper hook movable in a vertical plane and adapted to bemoved into the orbit of the looper prior to the formation of the loopand retained in this position until the loop has been completed.

11. In a shoe-sewing machine, a stitch forming mechanism consisting of aneedle, a shuttle mechanism, a loop forming mechanism, and mechanism foroperating said needle, combined with a pivoted looper hook, Signed by usat 19 Columbia st., Boston, and a cam member operated by said needleMass, this 13th day of May, 1913.

operating mechanism adapted to move said 4 hook into its operatingposition inthe orbit LAWRENCE JOHNSON of said looper and return it toits normal EDWARD ERICKSON' position, said cam being timed to produceWitnesses: said movements before and after the forma- WALTER E. Lommm),

tion of the loop. NATHAN C. LOMBARD.

